Canaan AvalonMiner 841 vs Whatsminer M66S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Canaan AvalonMiner 841 | Specification | Whatsminer M66S |
|---|---|---|
| 13.6 TH/s | Hashrate | 298.0 TH/s |
| 1,290 W | Power Consumption | 5,518 W |
| 94.9 J/TH | Efficiency | 18.5 J/TH |
| — | Noise Level | 50 dB |
| 4,700.0 kg | Weight | 13.5 kg |
| 4,402 BTU/hr | BTU Output | 18,827 BTU/hr |
| 31/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Canaan | Manufacturer | MicroBT |
Profitability Comparison
Canaan AvalonMiner 841
Whatsminer M66S
Based on BTC price of $77,866 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Whatsminer M66S wins on 4 of 5 factors (efficiency, hashrate, home mining score, noise level). Its biggest concrete edge: 2091% more hashrate (13.6 vs 298.0 TH/s). The Canaan AvalonMiner 841 holds the edge in power consumption. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Canaan AvalonMiner 841 and Whatsminer M66S diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Whatsminer M66S 2091% more hashrate (13.6 vs 298.0 TH/s)
- Canaan AvalonMiner 841 77% better power draw (1,290 vs 5,518 W)
- Whatsminer M66S 80% better efficiency (94.9 vs 18.5 J/TH)
- Whatsminer M66S 100% better weight (4,700.0 vs 13.5 kg)
- Whatsminer M66S 328% more heat output (4,402 vs 18,827 BTU/hr)
- Whatsminer M66S 42% more home mining score (31.0 vs 44.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Canaan AvalonMiner 841 | Metric | Whatsminer M66S |
|---|---|---|
| — | Upfront cost (MSRP) | $8,000 |
| -$2.61 | Daily net profit | -$2.57 |
| -$952 | Net after 1 year | -$8,936 |
| -$1,904 | Net after 2 years | -$9,873 |
| -$2,857 | Net after 3 years | -$10,809 |
| — | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Whatsminer M66SScore: 44/100. 50 dB noise level.
Best for Efficiency
Whatsminer M66S18.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Canaan AvalonMiner 841 or Whatsminer M66S more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Whatsminer M66S is more profitable at $-2.57/day compared to $-2.61/day for the Canaan AvalonMiner 841. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Canaan AvalonMiner 841 or Whatsminer M66S?
The Whatsminer M66S is quieter at 50 dB compared to the Canaan AvalonMiner 841 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Canaan AvalonMiner 841 or Whatsminer M66S?
The Whatsminer M66S scores 44/100 on our Home Mining Score (vs 31/100 for the Canaan AvalonMiner 841). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Canaan AvalonMiner 841 and Whatsminer M66S?
The Canaan AvalonMiner 841 runs at 94.9 J/TH while the Whatsminer M66S runs at 18.5 J/TH — a difference of 76.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 80% better efficiency (94.9 vs 18.5 J/TH).